New Original Siemens QBM3120‑25 Differential Pressure Sensor
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Siemens QBM3120‑25 Differential Pressure Sensor
Product Overview
Siemens QBM3120‑25 (Order‑No.: S55720‑S447) is a high‑precision air‑duct differential pressure sensor designed for HVAC building automation systemscache.indu It measures differential pressure of air and non‑aggressive gases within 0‑2500 Pa measuring range, outputs DC 4‑20 mA analog signal for BMS controllers. It supports switchable linear or square‑root extraction characteristic for pressure and airflow measurement. Widely used for air filter status monitoring, fan pressure detection, duct airflow calculation, and clean‑room pressure difference control in commercial buildings, ventilation systems and air‑handling units.
Main Functions
- Accurate differential pressure measurement for air and non‑corrosive non‑aggressive gases.
- Switchable measuring characteristic: linear for pressure measurement, square‑root extraction for airflow calculation.
- Adjustable end‑value range, configurable from 1600 Pa to 2500 Pa for on‑site matching requirements.
- DC 4‑20 mA active analog output signal compatible with mainstream building automation controllers.
- Built‑in zero‑point adjustment function for on‑site calibration after installation.
- Fast response time to capture rapid pressure fluctuation inside ventilation ducts.
- Integrated mounting bracket for quick wall or cabinet installation without extra fixtures.
Technical Features
- Diaphragm‑type sensing element with temperature compensation for stable measuring performance under varying ambient temperature.
- High measuring accuracy; total error of linearity, reproducibility and hysteresis less than ±0.6 % FScache.indu
- Short response time below 20 ms for dynamic pressure change trackinghit.sbt.si
- IP54 housing protection for indoor installation environment.
- Maintenance‑free design with excellent long‑term stability.
- 6.2 mm diameter pressure connection nipples for flexible tubing connection.
- Screw‑type electrical terminals for reliable wiring connection.
- Compliant with CE and EMC standards for building automation equipment.
Technical Data Table
| Item | Specification |
|---|---|
| Model | QBM3120‑25 |
| Order Code | S55720‑S447 |
| Brand | Siemens |
| Measuring Medium | Air and non‑aggressive gases |
| Nominal Measuring Range | 0 … 2500 Pa |
| Adjustable End‑value | 1600 Pa ~ 2500 Pa |
| Output Signal | DC 4‑20 mA |
| Power Supply | DC 8 … 33 V |
| Selectable Characteristic | Linear / Square‑root extraction |
| Response Time | ＜20 ms |
| Protection Class | IP54 |
| Overpressure Resistance | Max 0.1 bar |
| Ambient Operating Temperature | 0 °C ~ +70 °C |
| Storage & Transport Temperature | -25 °C ~ +70 °C |
| Ambient Humidity | Max 95 % RH, non‑condensing |
| Pressure Connection | ∅ 6.2 mm nipple |
| Electrical Connection | Screw terminals |
| Dimensions (W × H × D) | 101 mm × 86 mm × 49 mm |
| Net Weight | Approx 0.183 kg |
10 Similar‑function Siemens Differential Pressure Sensors
- QBM3120‑1: 0‑100 Pa measuring range, DC 4‑20 mA output, air duct differential pressure sensor
- QBM3120‑3: 0‑300 Pa measuring range, DC 4‑20 mA output for HVAC duct pressure monitoring
- QBM3120‑5: 0‑500 Pa differential pressure sensor, 4‑20 mA analog signal output
- QBM3120‑10: 0‑1000 Pa measuring range, DC 4‑20 mA output for ventilation systems
- QBM3120‑25D: QBM3120‑25 variant equipped with local digital display screen
- QBM3020‑25: 0‑2500 Pa differential pressure sensor, DC 0‑10 V voltage output signal
- QBM3020‑10: 0‑1000 Pa range, DC 0‑10 V output for building automation control
- QBM3230U5D: Multi‑range adjustable differential pressure sensor with digital display for North‑American market
- QBM2030‑1U: Compact differential pressure transmitter for clean‑room pressure monitoring
- QBM4000‑1: High‑performance differential pressure sensor for high‑accuracy ventilation measurement
WHO WE ARE
Sobre nosotros
Located in Kunshan, China, Atifts Technology Co., Ltd. is a well-known enterprise specializing in electronic components distribution. We specialize in the sales of global brands of industrial automation components, with a wealth of experience in foreign product agents, and many of the world's leading manufacturers such as Keens, Schneider, SMC, ABB, Siemens, and other world-renowned manufacturers to establish a long-term and stable relations of cooperation.
Atifts Technology Co., Ltd. @ 2024
Over the years, we have always adhered to the "pioneering, pragmatic, standardized, innovative" management philosophy, and constantly promote the close integration of products and market demand. We firmly believe that only by constantly exploring new market areas, doing a good job in every detail, standardizing business processes, and continuously innovating products and services can we ensure that our products are more adaptable to market changes and meet the diversified needs of our customers.
Since the founding of the company, we have always adhered to the core concept of "survival by quality", and are committed to providing customers with high-quality electronic components. At the same time, we take specialized R & D manufacturing as the goal, market-oriented development strategy to ensure that our products are always in the forefront of the industry.
With excellent product quality, professional technical service and good market reputation, Kunshan Autofits Technology Co.,Ltd. has won the trust and support of our customers. We look forward to working with more partners hand in hand, to achieve long-term win-win relationship, and jointly promote the prosperity of the electronic components industry.
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